[squid-users] Memory Allocation Error

Anyone can explain this error in our squid and how can I resolve
it!...Thanks
2002/01/29 00:48:25| Select loop Error. Retry 5
2002/01/29 00:48:25| comm_poll: poll failure: (12) Cannot allocate memory
2002/01/29 00:48:25| Select loop Error. Retry 1
2002/01/29 00:48:25| comm_poll: poll failure: (12) Cannot allocate memory
2002/01/29 00:48:25| Select loop Error. Retry 2
2002/01/29 00:48:25| comm_poll: poll failure: (12) Cannot allocate memory
2002/01/29 00:48:25| Select loop Error. Retry 3
2002/01/29 00:48:25| comm_poll: poll failure: (12) Cannot allocate memory
2002/01/29 00:48:25| Select loop Error. Retry 4
2002/01/29 00:48:25| comm_poll: poll failure: (12) Cannot allocate memory
2002/01/29 00:48:25| Select loop Error. Retry 5
2002/01/29 00:48:25| comm_poll: poll failure: (12) Cannot allocate memory
2002/01/29 00:48:25| Select loop Error. Retry 6
2002/01/29 00:48:25| comm_poll: poll failure: (12) Cannot allocate memory
2002/01/29 00:48:25| Select loop Error. Retry 7
2002/01/29 00:48:25| comm_poll: poll failure: (12) Cannot allocate memory
2002/01/29 00:48:25| Select loop Error. Retry 8
2002/01/29 00:48:25| comm_poll: poll failure: (12) Cannot allocate memory
2002/01/29 00:48:25| Select loop Error. Retry 9
2002/01/29 00:48:25| comm_poll: poll failure: (12) Cannot allocate memory
2002/01/29 00:48:25| Select loop Error. Retry 10
FATAL: Select Loop failed!
Squid Cache (Version 2.3.STABLE4): Terminated abnormally.
CPU Usage: 11137.070 seconds = 4697.590 user + 6439.480 sys
Maximum Resident Size: 0 KB
Page faults with physical i/o: 662431
Memory usage for squid via mallinfo():
        total space in arena: 72361 KB
        Ordinary blocks: 68896 KB 3786 blks
        Small blocks: 0 KB 0 blks
        Holding blocks: 176 KB 1 blks
        Free Small blocks: 0 KB
        Free Ordinary blocks: 3465 KB
        Total in use: 69072 KB 95%
        Total free: 3465 KB 5%

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